Atomic Structure and Properties

The video explores atomic structure, starting with the basics of atoms, nuclei, and electrons. It compares the vast emptiness of space, as seen by Voyager, to the emptiness within atoms, using gold and aluminum as examples. The video explains how neutrons travel through atoms and highlights the role of electrons and columbic forces in preventing us from passing through solid objects.

What is the relationship between protons and electrons in an atom?

• There are no electrons in an atom.

• The number of protons and electrons is equal.

• There are more protons than electrons.

• There are more electrons than protons.

What does the solar system analogy help to illustrate about atoms?

• Atoms are larger than planets.

• Atoms are mostly empty space.

• Atoms are mostly solid.

• Atoms have no nucleus.

What is the density of a gold nucleus?

• 2.3 times ten to the 17 kilograms per cubic meter

• 5.0 times ten to the 15 kilograms per cubic meter

• 1.5 times ten to the 10 kilograms per cubic meter

• 3.0 times ten to the 20 kilograms per cubic meter

How far apart are gold nuclei typically spaced?

• 1 mile

• 6 miles

• 20 miles

• 10 miles

What is the atomic mass of aluminum?

• 12

• 27

• 55

• 40

How many atoms does a neutron pass through in 72 centimeters of aluminum?

• 10 billion

• 1 billion

• 5 billion

• 2.8 billion

What is the mean path of a neutron in aluminum?

• 10 centimeters

• 50 centimeters

• 72 centimeters

• 100 centimeters

How many atoms does a neutron typically encounter before colliding with a nucleus?

• 10 million

• 100 million

• 1 billion

• 28 billion

Why don't we fall through the earth despite atoms being mostly empty?

• Because atoms are solid.

• Due to magnetic forces.

• Due to the columbic forces between electrons.

• Because of gravitational forces.

What concept is hinted at for future discussion regarding atomic structure?

• Gravitational forces

• Magnetic fields

• Columbic forces

• Nuclear fusion